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Server Connection and Browsing

Connect to OPC servers and browse their name spaces

Identify the host and ID of the OPC server you want to connect to. After you connect, you can retrieve server information and browse its name space.

Functions

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opcregisterInstall and register OPC Foundation core components
opcserverinfoVersion, server, and status information
opchdaserverinfoQuery host for installed HDA servers
opcuaserverinfo (opcua)Query host for installed OPC UA servers
opc.hdaSupportOPC Toolbox HDA troubleshooting utility
opc.daSupportOPC Toolbox data access troubleshooting utility
opcsupportOPC Toolbox troubleshooting utility
openosfOpen OPC Data Access Explorer session file
opcfindFind OPC Toolbox objects with specific properties
opcdaCreate OPC data access object
opchdaCreate OPC historical data access client
opcua (opcua)Create OPC UA client object
opcuanode (opcua)Create OPC UA node objects
connectConnect OPC Toolbox client to server
isConnectedTrue if HDA Client is connected to server
disconnectDisconnect OPC Toolbox client from server
propinfoProperty information for OPC Toolbox objects
obj2mfileConvert OPC Toolbox object to MATLAB code
opcresetDisconnect and delete all OPC Toolbox objects
opc.hda.resetDisconnect and delete all OPC HDA client objects
getnamespace (opcda)OPC DA server name space
getNameSpace (opchda)OPC HDA server name space
getNamespace (opcua)Namespace of OPC UA server associated with client
browsenamespace (opcda)Graphically browse OPC DA server name space
browseNameSpace (opchda)Graphically browse OPC HDA server name space
browseNamespace (opcua)Graphically browse name space and select nodes from OPC UA server
flatnamespaceFlatten hierarchical OPC name space
serveritemsQuery server or name space for fully qualified item IDs
opcserverinfoVersion, server, and status information
opchdaserverinfoQuery host for installed HDA servers
opcuaserverinfo (opcua)Query host for installed OPC UA servers
findDescription Locate OPC HDA servers with particular description
readItemAttributesRead item attribute values from OPC HDA server
serveritempropsProperty information for items in OPC server name space
getDescription Get description of OPC HDA aggregate type or item attribute
getIDFromNameTranslate OPC HDA aggregate type or item attribute name to numeric identifier
getIDListGet all aggregate type or item attribute IDs
getNameListGet all aggregate type or item attribute names
copyobjMake copy of OPC data access object
deleteRemove OPC Toolbox objects from memory
isvalidTrue for undeleted OPC Toolbox objects
saveSave OPC Toolbox objects to MAT-file
loadLoad OPC Toolbox objects from MAT-file
dispSummary of information for OPC Toolbox objects
getOPC Toolbox object properties
setConfigure or display OPC Toolbox object properties
opchelpHelp for OPC Toolbox data access function or property

Apps

OPC Data Access ExplorerExplore and exchange data with OPC Data Access servers

Properties

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GroupData Access Group objects contained by client
NameDescriptive name for OPC Toolbox object
TagLabel to associate with OPC Toolbox object
TypeOPC Toolbox object type
UserDataData to associate with OPC Toolbox object
HostDNS name or IP address of server
ServerIDServer identity
StatusStatus of connection to OPC server
TimeoutMaximum time to wait for completion of instruction to server

Topics

OPC Data Access (DA)

Discover Available Data Access Servers

Describes how to browse your network for OPC servers and how to browse an OPC server to find server item names.

Connect to OPC Data Access Servers

Describes how to create OPC Toolbox™ Data Access client objects and connect to OPC servers.

Access Data with OPC Data Access Explorer

Presents a step-by-step approach to using the toolbox to interact with OPC DA servers from MATLAB® software.

OPC DA Server Item Properties

DA server properties defined by the OPC Foundation.

OPC Historical Data Access (HDA)

Discover Available HDA Servers

Describes how to browse your network for OPC HDA servers, and how to browse an OPC server to find server item names.

OPC Toolbox HDA Objects

OPC Toolbox uses MATLAB objects to implement OPC HDA client functionality.

Create an OPC HDA Client Object

After determining the host name and server ID of the OPC server you want to connect to, you can create an OPC HDA client object.

Connect to the OPC HDA Server

OPC HDA client objects are not automatically connected to the server when they are created.

Set Client Properties

You can modify many properties specific to the created client.

Read Item Attributes

Each item that you find on a server might have a given set of item attributes associated with it.

OPC Unified Architecture (UA)

OPC UA Components

Description of OPC UA components and their interactions.

Featured Examples

Install a Simulation Server for OPC Toolbox Examples

Install a Simulation Server for OPC Toolbox Examples

Install a simulated OPC Server for use with the OPC Toolbox examples.

Open Script
Locate and Browse OPC Data Access Servers

Locate and Browse OPC Data Access Servers

Use OPC Toolbox™ to browse the network for OPC servers, and query the server name space for server items and their properties.

Open Script
Locate and Browse OPC Historical Data Access Servers

Locate and Browse OPC Historical Data Access Servers

Use the OPC Toolbox™ to browse the network for OPC Historical Data Access servers, and use OPC Toolbox functions to query the server name space for server items and their properties.

Open Script
Browse OPC UA Server Namespace

Browse OPC UA Server Namespace

Find OPC Unified Architecture (UA) servers, connect to them, and browse their namespace to find nodes of interest. To run this example in your MATLAB session, you will need to install and start the Prosys OPC UA Simulation Server. Read the Getting Started section of the OPC Toolbox documentation for further information.

Open Script

OPC Toolbox Documentation

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